This is a framed, wearable sculpture brooch. It is made of pewter, brass, bronze and nickel silver. It in interactive, with three moving parts. The door opens/closes, the steering wheel turns and the coal bin lid opens/closes. (Yes, there is a coal bin. This is a “steam powered” vehicle, requiring fuel.)
For a detailed & illustrated description of how this piece was made, go to: http://steamsmithworks.blogspot.com and scroll to August 22, 2015.